I know, I am not saying that to diminish gerrard or benitez.
It's just that Klopp improved the players he worked with immensely. And I think with that in mind, Gerrard could have been better than Salah.
And yes, we'd be sitting pretty with 21+ titles and another CL trophy.
As for who he replaces, that's not the question. Rather, who gets to play alongside him.